Thanks so far for the responses!
What happened - Alex and I were traveling from Fort Myers to St Pete - we had been in the truck for 90 minutes - he lays in a kennel and usually just adjusts - if he has to go he will sit up and cry - this time he kept moving around the crate like he was hurting - we had done no activity before leaving since it was raining. I stopped to see if he had to go - he would walk about 3 feet then sit, he ate some grass then walk a few more feet, I noticed that he would pull his back legs to the back of his body like he was trying to stretch his tummy - then immediately sit - as Corey can testify Alex is a very healthy vibrant and athletic pup even at 6 years old - we were on our way to the Purina Incredible Dog Challenge on an invite for dock jumping - Alex seemed stressed so I immediately looked for a vet - I went to one that was right off I75 - mind you my best friend/breeder of Alex is also my vet - I was in constant contact with her - she suggested a GasX thinking he just had gas - she had just seen him before we left the area because I always get his microchip read when leaving for an event - he appeared to be perfectly fine 90 minutes before - the first vet was not equipped for surgery per se and only took xrays - the doctor talked to Teri and was concerned of a stomach flip - he sent me to a specialist to get an ultra sound - after a 30 minute drive to the specialist and 1 minute under the ultrasound I was sent to an Emergency Hospital where I was fortunate was close and there was an Emergency Critical Care doctor on duty - Alex was no longer able to walk in and I carried him - he dropped one ball of #2 in the lobby and no longer could move - I carried him to the back and they started IVs, several xrays and laid him in a kennel. On Duty doctor had reviewed the films and could not tell what was wrong - she sent them to my doctor who also could not tell - he was in more pain - I decided to let the doctor go in and do exploratory surgery so approximately from the time I stopped to this emergency hospital another 90 minutes had passed - as soon as she went in his intestines were purple - she started to untwist them and was unsure if he was going to make it - after a few minutes they turned pink - there were no tears, nothing but some mushy debris in the intestines. The doctor tacked up his stomach and closed. Of course the next 18 hours were critical since he went into shock. 10 hours after the surgery he did stand up and walk out of the kennel to go pee. As of today (18 days post op) he is still eating only canned Rx I/D, he has lost weight (approx 5 pounds) he is very playful yet after he eats he does lay down, he is being fed small meals every four hours and we have started B12 injections for the next 6 weeks.
Symptoms: uneasy behavor in the kennel - not normal while traveling, walking/sitting, stretching of his back legs up and out towards the tail, he did have some vomitting after the drive to the second and third vet, anxious and stressed.
I'm looking for anything on why it happens, how it happens, what to do to prevent it and most of all - can it happen again??
I'm not sure what to do about feeding him so at this point its trial and error in very small quantities
Thanks for reading!! I am so sorry for all who have lost their pups to this and I pray none of you have to endure this scare or pain.